package operation;

import book.Book;
import book.BookList;

import java.util.Scanner;

public class DelOperation implements IOperation {
    public void work(BookList bookList) {
        System.out.println("删除图书");
        System.out.println("请输入书名");
        Scanner sc = new Scanner(System.in);
        String name = sc.nextLine();
        int currentSize = bookList.getUsedSize();
        int index = 0;
        for(int i = 0;i < currentSize;i++) {
            Book tmp = bookList.getBook(i);
            if(tmp.getName().equals(name)) {
                index = i;
                break;
            }
        }
        //挪动数据
        for (int j = index; j < currentSize-1; j++) {
           Book book = bookList.getBook(j+1);
           bookList.setBook(j,book);
        }
        bookList.setUsedSize(currentSize-1);
         //因为删除的是对象，所以把最后一个置为空
        bookList.setBook(currentSize-1,null);
        System.out.println("删除成功！");
    }
}
